Dispersion toughened ceramic composites and method for making same

Patent · Fri Sep 28 00:00:00 EDT 1984

OSTI ID:5718384

Stinton, D P; Lackey, W J; Lauf, R J

Ceramic composites exhibiting increased fracture toughness are produced by the simultaneous codeposition of silicon carbide and titanium disilicide by chemical vapor deposition. A mixture of hydrogen, methyltrichlorosilane and titanium tetrachloride is introduced into a furnace containing a substrate such as graphite or silicon carbide. The thermal decomposition of the methyltrichlorosilane provides a silicon carbide matrix phase and the decomposition of the titanium tetrachloride provides a uniformly dispersed second phase of the intermetallic titanium disilicide within the matrix phase. The fracture toughness of the ceramic composite is in the range of about 6.5 to 7.0 MPa..sqrt..m which represents a significant increase over that of silicon carbide.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Dept. of Energy
• Application Number: ON: DE85011601
• OSTI ID: 5718384
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CHEMICAL VAPOR DEPOSITION
FRACTURE PROPERTIES
PRODUCTION
SILICON CARBIDES
DISPERSION HARDENING
TITANIUM SILICIDES
CERAMICS
CARBIDES
CARBON COMPOUNDS
CHEMICAL COATING
DEPOSITION
HARDENING
MATERIALS
MECHANICAL PROPERTIES
SILICIDES
SILICON COMPOUNDS
SURFACE COATING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360301* - Composite Materials- Preparation & Fabrication- (-1987)